United Airlines on Wednesday became the first airline to operate out of London Heathrow Airport’s new Terminal 2, signaling the official opening of the renovated terminal following a £2.5 billion ($3.8 billion) upgrade.

The airline was scheduled to operate 17 departures from the terminal Wednesday, bringing all its operations at Heathrow—previously split between Terminals 1 and 4—under one roof for the first time.

United’s UK and Ireland sales director Bob Schumacher said, “Heathrow is one of the most important airports in United’s global network, and Terminal 2 represents a huge improvement in the service and facilities we are able to provide to all our customers, whether they’re departing, arriving or connecting.”

According to Star Alliance, all 23 member airlines operating at Heathrow will move over the next six months.

Air Canada, Air China and ANA will be the next new occupants, transferring their operations to T2 from June 18. In July, Aegean Airlines, EVA Airways, Thai Airways and Turkish Airlines will move in, together with Avianca—which will launch a service between London and Bogota July 4.

“After a break for the European summer holiday period, moves will resume in September with Egyptair, Ethiopian Airlines, Scandinavian Airlines and Singapore Airlines. Then finally, October sees the arrival of Air New Zealand, Asiana Airlines, Austrian, Brussels Airlines, Croatia Airlines, LOT Polish Airlines, Lufthansa, South African Airways, SWISS and TAP Portugal,” Star Alliance said in a statement.

Click here for United Airlines' videos of Terminal 2: The Queen's Terminal